Multiplex communications – Communication over free space – Having a plurality of contiguous regions served by...
Patent
1997-03-13
1999-05-18
Ton, Dang
Multiplex communications
Communication over free space
Having a plurality of contiguous regions served by...
370517, 370519, H04Q7/00
Patent
active
059057181
ABSTRACT:
In a cellular radio communication system, a downlink signal is multicast from a cental station and multiple base stations receive the multicast downlink signal via transmission links and respectively transmit the downlink signal on radio waves of same frequencies so that a cluster of adjoining areas is illuminated with the radio waves. A mobile station having a tapped-delay line equalizer receives signals from the base stations via multipath fading channels and equalizes the received signals. Interference between the transmitted signals is avoided by adjusting the relative propagation delay times of the transmission links so that the signals received by the mobile station occur within the tapped-delay line length of the equalizer.
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Anzai Makoto
Kurokami Yuzo
NEC Corporation
Sam Phirin
Ton Dang
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